I am posting my theory here and not in the guru section, because I am not a stock guru, but anyway, see if you like my hypothesis for the sake of argument:

(1) The ACQUIRED company (“xmsr”) will be the company that gets the bounce

(2) “siri” has the better CEO and will be the ACQUIRER

(3) Once joined, there could be only one receiver type, much like early on in radio we got am radio—allowing for the springing forth of broadcasting

(4) The NEW “siri” could tier services after a trial period offering all the services—Tiering would allow users only to have to subscribe to the services s/he desires—as with cable

(5) Looking at the “siri” and “xmsr” charts:
http://stockcharts.com/h-sc/ui?s=XMS...d=p68749676377
http://stockcharts.com/h-sc/ui?s=SIR...d=p68749676377

(6) Xmsr has the stronger Slow Stochastic, thus indicating strong interest by big buyers of the stock -- Is something afoot?
http://www.investopedia.com/terms/s/...oscillator.asp

(7) Its MACD has moved very big into the Buy range for "xmsr"

8 Its RSI is nicely above 50

(9) Its price is up

(10) All this speculating breaks one of Master Cramer's Rules: do NOT gamble on kinda/shoulda/woulda, so forget my speculating "siri" will start the acquitsition of Xm Radio within 30 days, because this is pretty lame, so forget what I have written...It's the weekend...